An exercise system includes two or more exercise machines coupled together. Each exercise machine can include a modular exercise machine offering one or more unique exercise functions. To vary or change the exercise system, the exercise machines may decouple from each other and couple to a different exercise machine. Examples of the exercise machines include osteogenic, muscular hypertrophy and cardiovascular devices. These exercise systems enable modifications to the exercise machines for user rehabilitation. The exercise machines can monitor other exercise machines and provide feedback to a user through a computer display.